Portable folding chair



June 15,1926.

1,588,575 G. GRUNWALD PORTABLE FOLDING CHAIR Filed Sept. 12. 1924 s sheetssheef 1 E illllil v] I 7 21 A, 3

l 1 gn ve'ntoq GEORGE. GRUNWALD.

June 15 1926. 7 1,588,575 I G. GRUNWALD v PORTABLE FOLDING CHAIR Filed Sept. 12, 1924 3 Sheets-Sheet 2 'jwventoc Gamma GRUNWALD.

$5., @Mflfll June 15 ,1926. I 1,588,575

G. GRUNWALD PORTABLE FOLDING CHAIR Filed Sept. 12, 1924 3 Sheets-Sheet 5 llllllllllllill GEORZGE. GRUNWALD.

i tion consists in general; ofqcertain novel details of; construction and combinations of Patented June 1926.

I STATES PATENT OFF-ICE.

engage ennNwALn, or snonxigmw Yonx.

IIPOR'IABLE FOLDING CHAIR.

; Application filed September 12, 19 24. SerialNo. 737,327.

tion-is to wprovidean improved form of folding chair whereinboththe-chair frame. and the. legs are. housedin a tubular stand- 1 21rd; when the, parts. are. collapsed.

A third important object of: the .inven- .;tion is. toprovide an. improved form of folding frame fonthe .seatand back portions of such a chair.

,ing. the legs.

A fifth important object of the inventionis, the provision ,of. an improved form. of folding frame for theback 'ofa collapsible chair. of this type.

Vith the aboye. and other objects in View as will be. hereinafter. apparent, the invenpartshereinafter fully described, illustrated in the accompanying: drawings, and specifi- V cally claimed.

: n h a c mpa ying d aw gs like ch acters of reference indicate, like parts in the several views, and:

Figure l is a :t'ront elevation of the chair cornrdetely expanded.

Figure 2 is a perspective view of the top part of thechair with the cloth forthe seat and back removed and showingthe frame fully expanded. V V

Figure is a view similanto Figure 2 r with the framepartly collapsed.

Figure 4 is a View of the device with the tially inserted in the. tube.

V F eee 1 sewn. n t 55 o Figure 1.

frame and legs fully. collapsed and par- Figure 1.

Figure 7 is a detail showing the arrange mentiof the hubs inthe housing tube, the

arms :andle gs being bro zen on.

Qshoiving a modification employing flanges A fourth important object of the inven-- tion is to provide improved means for holdessent f a uresor .0

Figure. 8 is a view similarto Figure 7 but .Figure, 9 is a section throughfone of the f ont a a m. swivel Figure ll is a'detail: section showing. the

connection between. the. front brace bars.

F1gurel2 1s. aperspectrve iew ofa slight modification of; ;th e'lo wer part of-"ther invention. I 2 In the embodiment oftheinvention, herein disclosed there; is.;shown,-;a tubular casing comprlslng. a; hous ng tube a 10 havingv a lower cap ll and: an uppercap 12. In the ,present i-nstancethe tube, 10 and; caps are cylindrical and the latter are screwed on the tube but it'wi'llbe obyioustoany mechanic that these caps may be. soldered or. brazed on and that both the, tubes. and caps may be of other shape-than-cylindrical, .thewparticular shape not in any way affectingthe peration and function of the device.

Y e. low r ap 11 is provided with ascries of: bayonet. slots 13 having extensionspll leadingfrom, the: bottom: edgeofgtl ie cap l1,-.toward the center. Ethereof. q: Slidable in the. bot m 611d Ofthetube, 1;0-.,is a plunger 15 havingYon its underssurface 'pIairs Gof spaced lugs 16 through which pass. pivot pins 17 Legs18 have their. inner. endsflpiv- I .oted, on these pins between respective: lugs and project through thei bayonet slots 13 or their extensionsvv 14 in accordance with the expanded or. collapsed position. of said legs. These legs may be provided with downwardly turned feet 19 but it is tofbe understoodthatzthe legs may be of anyidesired Shape.

"In the, upperend of the tube 10 is slidably mounted a plunger 20 similar to the plunger15, and like it, provided with pairs of. spaced :lugs2l having pivotipins 22 carrying arms 23. extending through .the

v I centralv opening 24 .of the upper cap 12, the

. Figure 6 is a section on. the .line 66 of.

latter being provided .with .notches 25 wherein the arms engage when unfolded;

Two of these arms project forwardly and,

in the form shown in Figure'Q, have re members are shown at 34 and on each of these pivots is a hook Similarly, on each forward arm 23, at'ltS free end ad acent the brace bar, is a hook 36. By means of these books a seat 87 may be supported on said arms, the latter resting, when'unfolded, in the notches 25., On the free endof each lower back bar is pivot-ed an upper back bar 38,-the pivot pointbeing slightly above the lower end so that a lug 39, projecting from the lower end portion of the upper back bar may, when the latter is erected, engage the side of the respective lower back bar to limit rotative movement of the upper bar. In order to permit the folding of members 32 and 38 without interference, the pivot connection between member 38 and the member 32, on the one hand, and the pivot connection between the member 32 and the arm 28, on the other hand, are so related that the planes of pivotal movement form an angle with each other. On'theseupper bars is'fitted a seat back 40 having'pockets 41 wherein said upper bars are received.

As shown in Figure 8 the upper and lower caps may be provided with flanges 42 to afford broader resting surfaces for the legs slots. They may then be folded toward shown in Figure each other and slipped up into the tube as back frame members; these may then be turned down on the lower back frame members and the two folded on the back arms.

Also the seat may bev 'unhooked and the back slid off the upper me a cated in Fig. l. The back arms, and their attachments may then be turned up and the whole slid into the tube, a partition as lim itingthe movements of both the legs and the folded arms. Obviously in setting up the reverse operation is performer.

In Figure 12 a modification has been shown wherein the legs 19 are provided with brace members 19, pivoted to the legs and connected together by central plate 19". This prevents the legs from spreading too much and may be used when needed.

There has thus been provided a simple and efficient device of the kind described and for the purpose specified.

It is obvious that minor changes maybe made in the form and construction of the invention without departing from the spirit thereof. It is not, therefore, desired to conline the invention to the exact form herein shown and described, but it is desired to include all such as properly come within the scope claimed.

Having thus described the invention, what is claimed as new, is:

1. In a folding chair, the combination of a tubular casing having at one end a plu rality of slots extending in axial direction from the edge of the casing and then in circumferential direction, a disc-like body in the casing movable lengthwise thereof and legs pivoted on said body for angular movement in radial planes, said slots being of a width to receive the legs.

2. In a folding chair, the combination of a tubular casing having at one end a plurality of notches, a disc-like body in the casing movable lengthwise thereof, arms pivoted on said body for angular movement in radial planes, the notches being ada ted to receive the arms, means on the arms for connection with a seat and bracing mechanism between two of said arms, comprising two membersconnected thereto, one toeach arm for universal movement relatively thereto, means'defining a pivotal connection between said members and; means constructed and arranged to co-operate with the two members to restrain relative pivotal motion thereof in one direction.

3. In a folding chair, the comblnation of a tubular casing having at one end. a plurality of notches, a disk-like body in the cas- 7 ing movable lengthwise thereof, arms pivoted on said body for angular movement in radial planes, the-notches being adapted to receive the arms, means on the arms for connection with a seat and means connected with two of said arms'to form the back of the chair, said'means comprising a pair of frame members, one pivotally connected to eacharm, means for limiting the extent of the pivotal movement, a second pair of frame members, one pivotally connected to the free end of each of said frame members and means for limiting the extent of the With the plane of the pivotal movement bepivotal movement of the second frame memtween the respective first frame members 10 V bers. and the corresponding arms to which they 4. A construction according to claim 3, are connected.

5 wherein the pivot connection between each In testimony whereof he hereunto affixes of the second frame members and the first his signature. frame members is so disposed that the plane Y I of the pivotal movement forms an angle GEORGE GRUNVVALD. 

